Marking means for film strips



June 13, 1939. R6EHRL 2,162,408

MARKING MEANS FOR FILM STRIPS Filed Sept. 26. 1936 ZZZZ\ W I fi waz fiaim ig m5. 5

Patented June 13, 1939 UNITED STATES PATENT OFFICE 2,162,408 MARKING MEANS FOR FILM STRIPS Bruno C. Roehrl, Binghamton, N. Y., assignor, by mesne assignments, to Agia Ansco Corporation, Binghamton, N. Y., a corporation of Delaware Application September 26, 1936, Serial No. 102,789 3 Claims. (01. 95-9) My invention pertains to marking means for of them will always be visible through the peepfilm strips and particularly to the protective hole of the camera during the movement of the paper backing with which a strip of sensitized film from one section to the next and so that film is rolled and which strip is provided with the visible curved line or lines will be substan- 5 spaced film section markings visible through a tially horizontal nearest the indicating marks peephole in the back of the camera so as to inand substantially vertical at a point substantially dicate the proper positioning of the film for each centrally between the marks. exposure and the number thereof. 1 Other objects and advantages will be apparent It sometimes occurs through carelessness or as the description proceeds, reference now beinadvertence that in winding the film through ing had to the figures of the accompanying drav the camera from one exposure section to the ing forming a part of this invention, wherein next, these indicating marks pass by the peeplike reference numerals indicate like parts. hole unnoticed, creating confustion in the mind In the drawing Figure 1 is a rear plan view of the user as to whether the proper winding of a conventional photographic camera showhas taken place or not. This results in the op ing the peephole through which the film section erator either taking a chance on having propmarks are visible. erly wound the film with the consequent risk Figure 2 is a detail plan view of a portion of of double exposure, or winding on until the next a strip of film backing paper showing the secnumber appears with the possible los of a section marks and my indicating marks therebetion which might otherwise have been exposed. tween.

The camera peephole through wich the indi- Figure 3 is a similar view showing a slightly cating marks are observed, s usually small and different arran t o he Cu ved lines.

the indicating numbers are likewise relatively Figure 4 is a detail view of the camera peepsmall. This requires a great deal of care on hole illustrating the appearance of the curved the part of the user of the camera in winding lines therethrough just as the strip is starting H the film slowly so as not to miss the number from one section mark toward the next. when it appears through the peephole. The Figure 5 is a similar detail view illustrating peepholes are usually colored red so as to filter the appearance of one of the curved .lines at out any actinic light passing therethrough and substantially a central point between two section this coloring reduces the ease with which the marks.

indications are seen through the peephole. Figure 6 is a similar detail view illustrating It is also true that in most cases the protective the appearance of the curved lines just as the backing paper is also red in color, which further strip approaches the next section mark.

renders difiicult the clear observance of the move- The reference character i indicates generally merit of the film and paper from one position a photographic camera which has been illusto the next. trated as of the folding type, but which may The principal object of my invention is to probe of any desired type or construction. This vide an indicating means on the film backing camera is provided with a back 2 in which is paper between the section marks which means provided the peephole or window 3, suitably covare visible through the peephole at all times and cred as at I by Celluloid or glass-usually of which, by their character and arrangement, a color to filter out actinic rays, but of sufficient clearly indicate the approach of the next intransparency to permit observing the film section dicating mark. This means that the film can marks 5 thereunder. be rapidly wound from one section to the next The film backing or protecting strip 6 is pro- 4 and the approach of the next section mark is vided with the section marks 5 at spaced interclearly indicated, thus greatly reducing the valsand corresponding in number to the number danger of overrunning or stopping short. of exposure sections provided on the film. Each More specifically, my invention comprises the of these section marks is usually plural in numuse of curved lines extending between the secber in order that at least one of them will aption marks on the film backing paper, such pear through the peephole 3.

curved lines being concentrically arranged and On either side of the section marks 5 and diterminating in a straight line directly adjacent rectly adjacent thereto are provided the straight each section number or mark. lines 1 between which the section marks are It is an object of my invention to arrange these placed. curved lines in such manner that at least one Extending between spaced section marks 5 and.

beginning with the straight lines 1 next adjacent thereto, are a plurality of curved lines 8 so arranged that their ends terminate close together and coincident with the straight lines 1. In between the straight lines 1 the curved lines spread apart somewhat as shown and at substantially the central point between the section marks, the curved lines are substantially vertical.

It will be noted that with this arrangement of curved lines, the same are substantially horizontal at point Where they coincide with the straight lines 1 adjacent the indicating section marks.

The result is that when the film strip with its backng strip 6 is wound through the camera, one or more of the curved lines 8 are visible through tion marks toward the next.

As the winding continues and approaches the central point between the section marks, one of the lines 8 appears substantially centrally through the peephole and in a substantially vertical position.

As the winding brings the strip adjacent the next position again as the next straight line 1 appears in View, thus warnoperator that only a very slight additional winding is necessary to bring the film into proper position for the next exposure.

In actual operation, the passage of the curved lines 8 beneath the peephole gives the effect of appended claims.

I claim:

succeeding film section mark.

2. A roll film having an opaque protective strip provided with film section marks in spaced relation, a plurality of closely spaced curved indicatstantially lengthwise of the strip in the portion of said lines intermediate the section numbers to indicate the approach of the succeeding film section mark.

3. A roll film having an opaque protective strip provided with tion, a plurality indicate the approach of the succeeding film section mark, said lines converging together adjacent said marks.

BRUNO C. ROEHRL. 

